Cu(<scp>i</scp>)/Fe(<scp>iii</scp>)-Catalyzed C–P cross-coupling of styrenes with H-phosphine oxides: a facile and selective synthesis of alkenylphosphine oxides and β-ketophosphonates
作者:Jian Gu、Chun Cai
DOI:10.1039/c7ob00505a
日期:——
Cu(I)/Fe(III)-Catalyzed phosphorylation and oxyphosphorylation of styrenes with H-phosphonates which can be controlled by varying the reaction temperature are developed. This study offers a new and expedient strategy for the synthesis of useful alkenylphosphine oxides and β-ketophosphonates in satisfactory yields. Moreover, the transformation is proposed to proceed via a radical process and exhibits
yields (13–99%), from tetraethylmethylenediphosphonate, an aromatic or aliphatic aldehyde and potassium tert-butoxide, using 5 min of mortar and pestle grinding. Potassium tert-butoxide acts as a base and liquid-assisting grinding agent. All isolated products were fully characterized as (E)-isomers through NMR spectroscopy. Furthermore, among the synthesized compounds diethyl (E)-2-(4-methoxyphenyl)vinylphosphonate
摘要 在这里,我们报告了通过无溶剂机械活化的 Horner-Wadsworth-Emmons (HWE) 烯化,从亚甲基二膦酸四乙酯(一种芳香族或脂肪族醛)以常规至优异的产率(13-99%)温和合成 15 种膦酸肉桂酸酯和叔丁醇钾,用研钵和杵研磨 5 分钟。叔丁醇钾用作碱和助液研磨剂。所有分离的产物都通过 NMR 光谱完全表征为 ( E )-异构体。此外,在合成的化合物中,发现 ( E )-2-(4-甲氧基苯基)乙烯基膦酸二乙酯1是一种有趣的细胞毒剂,可抑制两种乳腺癌细胞系的生长 (MDA-MB-453, IC 50= 79 µg/mL 和 MCF-7 IC 50 = 64 µg/mL)。据我们所知,这是首次报道机械活化 HWE 反应用于合成 α、β-不饱和膦酸盐,并且其中一些首次被评估为对乳腺癌细胞系的细胞毒剂。总之,( E )-膦酸肉桂酸酯的快速且操作简单的合成提供了新的有前途的细胞毒
Zyablikova, T. A.; Il'yasov, A. V.; Mukhametzyanova, E. Kh., Journal of general chemistry of the USSR, 1982, vol. 52, # 2, p. 249 - 252
作者:Zyablikova, T. A.、Il'yasov, A. V.、Mukhametzyanova, E. Kh.、Shermergorn, I. M.
DOI:——
日期:——
Diastereoselective Synthesis of 2-Amino-4-phosphonobutanoic Acids by Conjugate Addition of Lithiated Schöllkopf's Bislactim Ethers to Vinylphosphonates
作者:María Ruiz、M. Carmen Fernández、Aniana Díaz、José M. Quintela、Vicente Ojea
DOI:10.1021/jo034707q
日期:2003.10.1
Conjugateadditions of lithiatedbislactimethers derived from cyclo-[Gly-Val] and cyclo-[Ala-Val] to alpha-, beta-, or alpha,beta-substituted vinylphosphonates allow direct and stereoselective access to a variety of 3- or 4-monosubstituted and 2,3-, 2,4-, or 3,4-disubstituted 2-amino-4-phosphonobutanoic acids (AP4 derivatives) in enantiomerically pure form. The relative stereochemistry was assigned